Éowyn says “I am no man” before defeating the Witch-king in Tolkien’s story.
Éowyn is a noblewoman of Rohan and the niece of King Théoden. Barred from openly joining the army because of her gender and position, she disguises herself as the soldier Dernhelm and rides to the Battle of the Pelennor Fields.
There she confronts the Witch-king of Angmar, who declares that no living man may hinder him. Éowyn reveals her identity, answers with the famous line, and strikes the fatal blow after Merry’s enchanted blade helps make the Nazgûl vulnerable. The victory is therefore a joint effort, although Éowyn delivers the final attack.
The scene is sometimes remembered as a simple prophecy loophole. Its dramatic force also comes from Éowyn’s defiance of the restrictions placed on her and her choice to defend Rohan directly.